Constraint Check « Constraints « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Constraints
  3. Constraint Check
1.Constriant: check value between 0 and 100
2.State a check constraint that check relation between two columns
3.Follow the contraint
4.add constraint for a column: check (gender in ('MALE', 'FEMALE'))
5.Constraint check with 'upper' function
6.Constraint check with in function
7.Violate constraints
8.Check date type column for nullable and value range
9.Check nullable and value range for one single column data




10.Add two conditions for one column
11.Add constraint for date type column
12.A check constraint can also be created or added as a table constraint.
13.Add constraint to ensure that value from one column is bigger than that from another
14.Setting CHECK constraint for number type field
15.Setting the Check constraint for int value field during declaration
16.Syntax for adding check constraint to a column
17.Use decode() function in check constraints
18.Violate a check constraint
19.alter table dept add emp_count number, constraint must_be_between_3_8, check(emp_count between 3 and 8 OR emp_count = 0), deferrable initially deferred
20.Could only contain three values
21.Must be upper case